package com.greensock.easing {
	public class Back {
		public static function easeIn(t : Number, b : Number, c : Number, d : Number, s : Number = 1.70158) : Number {
			return c * (t /= d) * t * ((s + 1) * t - s) + b;
		}

		public static function easeOut(t : Number, b : Number, c : Number, d : Number, s : Number = 1.70158) : Number {
			return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
		}

		public static function easeInOut(t : Number, b : Number, c : Number, d : Number, s : Number = 1.70158) : Number {
			if ((t /= d * 0.5) < 1) return c * 0.5 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b;
			return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b;
		}
	}
}
